18.1 SwiftUI App Hierarchy
When considering the structure of a SwiftUI application, it helps to view a typical hierarchy visually. Figure 18-1, for example, illustrates the hierarchy of a simple SwiftUI app:
Figure 18-1
Before continuing, it is important to distinguish the difference between the term “app” and the “App” element outlined in the above figure. The software applications that we install and run on our mobile devices have come to be referred to as “apps”. In this chapter reference will be made both to these apps and the App element in the above figure. To avoid confusion, we will use the term “application” to refer to the completed, installed and running app, while referring to the App element as “App”. The remainder of the book will revert to using the more common “app” when talking about applications.
